ABB ACS880-1604, Руководство по оборудованию

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68 Electrical installation
Checking the insulation of the energy storage cable
WARNING! Repeat the steps described in section Electrical safety
precautions on page 66 . The complete safety instructions are given in
See Safety instructions for ACS880 multidrive cabinets and modules
(3AUA0000102301 [English]). Ignoring the instructions can cause
physical injury or death, or damage to the equipment.
WARNING! Open the DC switch/disconnector [Q11] of each DC/DC converter.
Do not make any voltage tolerance or insulation resistance tests on the converter
modules. Every converter module has been tested for insulation between the main circuit
and the chassis at the factory.
Check the insulation resistance of the energy storage as instructed by its manufacturer.
Check the energy storage cable as follows:
1. Make sure that the cable is disconnected from the DC/DC converter and energy
storage: all conductors and the shield.
2. At the converter unit end, connect all conductors and shield of the cable together and
to the grounding terminal (PE).
3. Disconnect one conductor and measure the insulation resistance between the
conductor and the PE by using a measuring voltage of 1 kV DC. The insulation
resistance must be higher than 1 Mohm.
4. Reconnect the conductor, disconnect another conductor and measure its insulation
resistance. Repeat this for all remaining conductors (including the cable shield).
ohm
+
-
Energy storage